CN115320097A - Powder paving device and 3D printing equipment - Google Patents

Abstract

The application relates to a spread powder device, including device body (100), cylinder screen cloth (200) and feeding mechanism (300), cylinder screen cloth (200) can set up with rolling on device body (100), just cylinder screen cloth (200) is towards spreading the powder face, the one end of feeding mechanism (300) extends to in cylinder screen cloth (200), feeding mechanism (300) be used for to feed in cylinder screen cloth (200), cylinder screen cloth (200) rotate so that the powder is spread in spread on the powder face. The application also relates to a 3D printing device. This scheme can be solved and spread powder device among the present 3D printing apparatus has the relatively poor problem of powder homogeneity of shop.

Description

Powder paving device and 3D printing equipment

Technical Field

The invention relates to the technical field of 3D printing equipment, in particular to a powder paving device and 3D printing equipment.

Background

The existing 3DP printing technology mainly aims at additive manufacturing, and parts with complex structures are formed by performing layered printing, sintering, melting and bonding on powder solids of different materials. The general flow is as follows: data slicing processing, descending of a work box, powder spreading of a powder spreading device, printing of slice images by a printing head, descending of the work box again, powder spreading of the powder spreading device again, printing of the slice images by the printing head again, and sequential printing and cyclic working. In the whole working process, the powder spreading device is used as an important forming structure, the powder needs to be continuously operated and spread for hundreds of times in the whole forming process, the accurate, horizontal and uniform powder spreading of each layer is guaranteed in the important process, the operation stability of the powder spreading device is needed, and the problems of powder falling, powder pushing and powder pulling cannot occur.

Generally, spread powder device formula structure as an organic whole, this kind of condition leads to when adjusting powder volume down, causes the precision of floating the structure easily to change, and interlinkage between each part, adjusts the difficulty to it is relatively poor to lead to every layer to spread the homogeneity of powder face, and then leads to printing an unqualified. And the existing powder spreading device has complex structure, high equipment cost and difficult adjustment and recovery, thereby being difficult to achieve ideal efficiency and benefit.

Disclosure of Invention

Based on this, it is necessary to provide a powder paving device and 3D printing apparatus to the problem that the powder paving uniformity is poor in the powder paving device in the current 3D printing apparatus.

In order to solve the problems, the invention adopts the following technical scheme:

the embodiment of the invention discloses a powder spreading device which comprises a device body, a roller screen and a feeding mechanism, wherein the roller screen is arranged on the device body in a rolling manner and faces a powder spreading surface, one end of the feeding mechanism extends into the roller screen, the feeding mechanism is used for feeding materials into the roller screen, and the roller screen is rotated or swung to spread powder on the powder spreading surface.

In one embodiment, the feeding mechanism comprises a feeding bin and a feeding bin which are communicated, the feeding bin is provided with a feeding hole, the feeding bin is at least partially positioned in the roller screen, and the bottom of the feeding bin is provided with a discharging hole facing the roller screen.

In one embodiment, the feeding mechanism further comprises a material conveying portion, the material conveying portion is rotatably disposed in the feeding bin, one end of the material conveying portion faces the feeding port, and the other end of the material conveying portion extends along the length direction of the discharging port.

In one embodiment, the feeding mechanism further comprises an agitating part, and the agitating part is rollably arranged in the feeding bin.

In one embodiment, the feeding part and the stirring part are arranged in sequence in the direction from the feeding hole to the discharging hole.

In one embodiment, the second end of the feeding mechanism is provided with a cleaning part, the cleaning part is positioned in the drum screen and extends along the length direction of the drum screen, and the cleaning part is used for cleaning the inner wall of the drum screen.

In one embodiment, the vibration mechanism is further comprised for vibrating the drum screen.

In one embodiment, the vibrating mechanism is a vibrating ball disposed in the drum screen.

In one embodiment, the drum screen is formed by splicing a plurality of screen segments, the screen segments are sequentially arranged in the rotation direction of the drum screen, and the mesh sizes of the screen segments are different.

In a second aspect, an embodiment of the present invention discloses a 3D printing apparatus, including the above-described powder spreading device.

The technical scheme adopted by the invention can achieve the following beneficial effects:

in the powder paving device disclosed by the embodiment of the invention, the powder conveyed into the roller screen can be uniformly dispersed in the roller screen through the rolling or swinging action of the roller screen, meanwhile, the caking in the powder can be dispersed, and then the powder is paved on the powder paving surface through the meshes of the roller screen. Meanwhile, the powder spreading quality is guaranteed, the structure is simple, and the replacement is convenient.

Drawings

Fig. 1 is a schematic partial structural diagram of a 3D printing apparatus according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a powder laying device disclosed by the embodiment of the invention.

FIG. 3 shows an embodiment of the present invention

Description of the reference numerals:

100-device body, 200-roller screen, 210-mesh, 300-feeding mechanism, 310-feeding bin, 311-feeding port, 320-feeding bin, 330-conveying part, 340-stirring part, 350-cleaning part, 400-vibrating mechanism, 500-equipment body and 600-work box.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "left," "right," "top," "bottom," "top," and the like are for purposes of illustration only and do not represent the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 3, the embodiment of the present invention discloses a powder laying device, which plays a role of laying powder in a printing apparatus, and the disclosed powder laying device includes adevice body 100, aroller screen 200, and afeeding mechanism 300.

Thedevice body 100 is a main body component of the powder spreading device, thedevice body 100 can provide a mounting position for other components of the powder spreading device, theroller screen 200 can be arranged on thedevice body 100 in a rolling manner, specifically, a transmission part can be arranged on one side of thedevice body 100, a rotating shaft can be arranged on one side of theroller screen 200, and the transmission part can be rotatably connected with the rotating shaft, of course, the rotary connection mode of theroller screen 200 and thedevice body 100 can be various, and the embodiment of the invention is not limited thereto.

Of course, in a specific installation process, thedrum screen 200 may be rollably disposed at one end of theapparatus body 100, and the other end of theapparatus body 100 may be fixed to the device body 500 to achieve assembly.

In the embodiment of the present invention, theroller screen 200 faces the powder spreading surface, that is, theroller screen 200 may face the work box 600, in this way, the powder sieved out of theroller screen 200 directly falls onto the powder spreading surface of the work box 600, thereby implementing the powder spreading operation.

Further, thepowder supplying mechanism 300 is used for supplying powder into thedrum screen 200, and particularly, one end of thepowder supplying mechanism 300 extends into thedrum screen 200 so as to be capable of conveying powder into thedrum screen 200, and when thepowder supplying mechanism 300 is installed, thepowder supplying mechanism 300 may be connected to the apparatus body 500 so as to achieve the overall assembly of thepowder supplying mechanism 300. Alternatively, thepowder supply mechanism 300 and thedevice body 100 may be respectively disposed at two sides of the apparatus body 500, and theroller screen 200 is disposed between thepowder supply mechanism 300 and thedevice body 100, so that not only is the compactness of the whole apparatus better, but also interference of each component can be prevented to ensure the powder spreading effect.

In the specific working process, thefeeding mechanism 300 is used for feeding the powder into theroller screen 200, when the powder is conveyed into theroller screen 200, theroller screen 200 disperses the powder inside through rotation or swing, and disperses the solidified cakes in the powder, and then the powder is laid on the powder laying surface through the screening function of theroller screen 200, so that the powder laying operation is realized.

From the above, in the powder spreading device disclosed in the embodiment of the present invention, the powder conveyed to theroller screen 200 can be uniformly dispersed therein and simultaneously the agglomerates in the powder can be dispersed by the rolling or swinging action of theroller screen 200, and then the powder is spread on the powder spreading surface through the meshes of theroller screen 200, compared with the existing powder spreading mechanism, in this way, the powder spreading is more uniform, the problem of sand pulling and pushing is prevented, and the powder amount can be controlled by adjusting the mesh number and the rotating speed of the meshes of theroller screen 200, so as to further improve the practicability. Meanwhile, the powder spreading quality is guaranteed, the structure is simple, and the replacement is convenient.

In the embodiment of the present disclosure, thefeeding mechanism 300 may include afeeding bin 310 and afeeding bin 320 that are communicated with each other, thefeeding bin 310 may have afeeding hole 311, at least a portion of thefeeding bin 320 may be located in thedrum screen 200, and a discharging hole facing thedrum screen 200 may be opened at the bottom of thefeeding bin 320, so that the powder may be conveyed into thedrum screen 200. In this case, thefeeding bin 310 serves to temporarily store the powder and supply the powder to thefeeding bin 310, so that the powder spreading effect can be ensured, and thefeeding bin 320 is at least partially disposed in thedrum screen 200 to ensure a better powder supply effect.

Meanwhile, the discharge hole at the bottom of thepowder supply bin 320 can extend along the length direction of theroller screen 200, so that powder can be supplied to each position inside theroller screen 200, theroller screen 200 can disperse the powder better, and the powder can be laid on the powder laying surface more uniformly.

Further, thefeeding mechanism 300 further includes amaterial conveying portion 330, thematerial conveying portion 330 is rollably disposed in thefeeding bin 320, and one end of thematerial conveying portion 330 faces thematerial inlet 311, so that the powder entering thefeeding bin 320 firstly falls onto thematerial conveying portion 330, and the other end of thematerial conveying portion 330 can extend along the length direction of the material outlet. Under this condition, through the rotation effect of defeatedmaterial portion 330 to make the powder that gets into infeed bin 320 move along the axial direction of defeatedmaterial portion 330, thereby be convenient for the powder infeed bin 320 to remove, and then make the length direction distribution along the discharge gate of carrying the powder in thecylinder screen 200 through the discharge gate comparatively even, so that lay to the powder of shop's powder face more even, in order to improve shop's powder effect.

Of course, thefeeding portion 330 may be a rotating member having a spiral periphery, or may be another rotating member capable of performing a feeding operation, which is not limited in the embodiment of the present invention.

In the disclosed embodiment of the present invention, thefeeding mechanism 300 may further include astirring part 340, and thestirring part 340 may be rollably disposed in thefeeding bin 320. In this case, the powder can be better dispersed in thefeeding bin 320 by the stirring operation of thestirring part 340, so that the blocking of the powder can be prevented and the agglomeration in the powder can be better dispersed. Meanwhile, the mode can ensure that the blanking is more uniform so as to improve the powder laying effect.

Further, in order to ensure the stirring effect, thestirring part 340 can extend along the length direction of the discharge port, so that the powder conveyed into theroller screen 200 through the discharge port is distributed more uniformly along the length direction of the discharge port, and the powder paved to the powder paving surface is more uniform, thereby improving the powder paving effect. In an alternative scheme, thestirring part 340 may include a rotating part and a plurality of blades, the plurality of blades may be arranged at intervals along the circumferential direction of the rotating part, and each blade may extend along the length direction of the discharge port, the structure of thestirring part 340 is simple, and a better stirring operation can be performed. Of course, the specific structure of the stirringportion 340 may be various, and the embodiment of the present invention is not limited thereto.

In an alternative embodiment, thefeeding unit 330 and thestirring unit 340 may be arranged in sequence in a direction from thefeeding port 311 toward the discharging port. As shown in fig. 3, in this case, the powder is uniformly conveyed to the stirringportion 340 by the conveyingportion 330, and then the powder is stirred by the stirringportion 340, so that the powder can be more uniformly dispersed, and further the powder conveyed into thedrum screen 200 through the discharge port is more uniformly distributed along the length direction of the discharge port, so that the powder paved to the powder paving surface is more uniform, and the powder paving effect is improved.

In the embodiment of the disclosure, thefeeding mechanism 300 may be provided with a cleaningportion 350, the cleaningportion 350 may be located in thedrum screen 200, the cleaningportion 350 may extend along the length direction of thedrum screen 200, and the cleaningportion 350 is used for cleaning the inner wall of thedrum screen 200. In this case, thecleaning part 350 is relatively prohibited during the rotation of thedrum screen 200, so that the inner wall of thedrum screen 200 can be cleaned, thereby preventing the clogging of the mesh holes of thedrum screen 200.

Alternatively, thecleaning part 350 may be a brush, the brush is located between thefeeding mechanism 300 and the inner wall of theroller screen 200, and the brushing part of the brush may face the inner wall of theroller screen 200, so as to brush the inner wall of theroller screen 200 during the rotation of theroller screen 200, thereby preventing powder from blocking the mesh holes on theroller screen 200, and ensuring the powder spreading effect. Of course, the cleaningportion 350 may be other structural members, and the embodiment of the invention is not limited thereto.

The powder spreading device disclosed by the embodiment of the invention can also comprise avibration mechanism 400, and thevibration mechanism 400 can be used for vibrating theroller screen 200. In this case, thevibration mechanism 400 prevents the mesh of thedrum screen 200 from being clogged, thereby improving the efficiency of spreading the powder.

In an alternative embodiment, thevibration mechanism 400 may be a vibrating ball, which may be disposed in thedrum screen 200. In this case, in the process of the rotation of thedrum screen 200, the vibration balls bounce inside thedrum screen 200, so that the vibration force can be provided to thedrum screen 200 through the contact with thedrum screen 200, and the blocked meshes are flicked to ensure the powder discharging efficiency. Simultaneously, at the vibration in-process of vibration ball, because the vibration ball is in between the inner wall offeed storehouse 320 andcylinder screen 200 to make the vibration ball can also contact with the outer wall offeed storehouse 320, and then can play the effect of vibration to feedstorehouse 320, produce the sand-sticking phenomenon in preventingfeed storehouse 320, with the feed effect of guaranteeingfeed storehouse 320. Moreover, the vibration ball can be an elastic ball, so that the vibration effect is ensured. Of course, thevibration mechanism 400 may be other structural members, such as a vibrator, and the embodiment of the invention is not limited thereto.

Further, another vibration member may be disposed between thesupply bin 320 and the inner wall of thedrum screen 200, so that thesupply bin 320 and thedrum screen 200 may be vibrated at the same time to prevent sand sticking or mesh blockage.

In the embodiment disclosed by the invention, theroller screen 200 can uniformly disperse the powder in theroller screen 200 in a rotating manner, so that the powder is uniformly scattered on the powder spreading surface; thedrum screen 200 may also uniformly disperse the powder in thedrum screen 200 in a swinging manner, so that the powder is uniformly scattered onto the powder spreading surface, in this case, the swinging angle of thedrum screen 200 may be 60 °, 90 °, or 120 °, and the like, and a worker may adjust the swinging angle of thedrum screen 200 according to a specific powder spreading rate, which is not limited in the embodiment of the present invention.

In an alternative embodiment, thedrum screen 200 may be formed by splicing a plurality of screen segments, and the plurality of screen segments may be sequentially arranged in the rotation direction of thedrum screen 200, and the mesh size of each screen segment is different. In this case, theroller screen 200 may be rotated to orient different screen segments toward the powder spreading surface, so that the powder spreading rate of theroller screen 200 may be changed to improve the practicability of the powder spreading device.

In the embodiment of the present invention, thedrum screen 200 may be provided with a plurality of spaced-apart meshes 210, and the number of themeshes 210 may gradually increase from the center of thedrum screen 200 to both ends; alternatively, the size of themesh 210 is gradually decreased in the direction from the center to both ends of thedrum screen 200; alternatively, the number of themeshes 210 may be gradually increased and the sizes of themeshes 210 may be gradually decreased in the center to both ends direction of thedrum screen 200. The mode can improve the uniformity of powder spreading so as to ensure the powder spreading effect.

Based on the powder paving device disclosed by the embodiment of the invention, the embodiment of the invention also discloses 3D printing equipment, which comprises the powder paving device disclosed by any embodiment.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. The utility model provides a spread powder device, its characterized in that includes device body (100), cylinder screen cloth (200) and feed mechanism (300), cylinder screen cloth (200) rollably set up in on device body (100), just cylinder screen cloth (200) are spread the powder face towards, the one end of feed mechanism (300) extends to in cylinder screen cloth (200), feed mechanism (300) be used for to feed in cylinder screen cloth (200), cylinder screen cloth (200) are through rotating or swing so that the powder is spread in spread on the powder face.

2. The powder paving device according to claim 1, wherein the feeding mechanism (300) comprises a feeding bin (310) and a feeding bin (320) which are communicated, the feeding bin (310) is provided with a feeding hole (311), the feeding bin (320) is at least partially arranged in the roller screen (200), and the bottom of the feeding bin (320) is provided with a discharging hole facing the roller screen (200).

3. The powder paving device as recited in claim 2, wherein the feeding mechanism (300) further comprises a feeding unit (330), the feeding unit (330) is rotatably disposed in the feeding bin (320), one end of the feeding unit (330) faces the feeding port (311), and the other end of the feeding unit (330) extends along the length direction of the discharging port.

4. A dusting device according to claim 3, characterized in that said feeding mechanism (300) further comprises a stirring part (340), said stirring part (340) being rollably arranged in said feeding bin (320).

5. A powder spreading device as claimed in claim 4, wherein the delivery part (330) and the stirring part (340) are arranged in sequence in a direction from the feed opening (311) to the discharge opening.

6. The powder paving device as recited in claim 1, characterized in that a cleaning part (350) is arranged on the feeding mechanism (300), the cleaning part (350) is arranged in the roller screen (200), the cleaning part (350) extends along the length direction of the roller screen (200), and the cleaning part (350) is used for cleaning the inner wall of the roller screen (200).

7. A dusting apparatus according to claim 1, characterized in that it further comprises a vibration mechanism (400), said vibration mechanism (400) being adapted to vibrate said drum screen (200).

8. A dusting device according to claim 7, characterized in that the vibrating mechanism (400) is a vibrating ball, which is arranged in the drum screen (200).

9. The powder paving device as claimed in claim 1, wherein the roller screen (200) is formed by splicing a plurality of screen segments, the screen segments are sequentially arranged in the rotation direction of the roller screen (200), and the mesh sizes of the screen segments are different.

10. 3D printing apparatus, characterized in that it comprises a powdering device according to any one of claims 1 to 9.

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